Nano Beads Mold Each firing of the new Nano Bead design creates six square beads, six round beads, and two cabochons. The beads are small, each measuring about 5/8 inch (15mm) in diameter. Because of mold’s engineering, the beads almost never require any cold work - grinding or polishing. This design coordinates beautifully with all of Colour de Verre's Jewelry designs including the Pillow Pendants, Geometric Beads, and Small Ring Beads. They can be strung on leather, rubber, or silk, or even stainless steel ball chain. The mold itself measures 4.5 x 7 x 1 inches (11.5 x 18 x 2.5 cm). The fill weight for each of the six squares is 2-3 grams. For the circles; 1 to 2 grams; For the two cabochons; 1 gram.